Sometimes when you've covered all bases of hair style you have to bring in new elements. The Artiste employs the joining of beard with head-hair to make one unbreakable circle of follicle genius. What Jake's done here is implied that he's so liberal and arty that he's let his hair (all types of hair - he does not discriminate between facial or otherwise) run free to reflect the freedom of his artistic endeavours. The beard also allows him to scratch his chin contemplatively when pondering his next project or being asked a question he doesn't understand. It also gives him the soft and harmless face of a great thinker. But be warned - in terms of length, there's a fine line in the beard world between philosopher and sex offender.
